公开(公告)号：JPH0754602A

公开(公告)日：1995-02-28

申请号：JP16234594

申请日：1994-07-14

Applicant: ABB MANAGEMENT AG

Inventor： EDOUARUTO PURIMOSHITSUTSU ,  PAABUERU RIHAKU

IPC: F01D5/06 ,  F01D5/08 ,  F02C7/18

Abstract: PURPOSE: To effectively cool a rotor by supplying cooling air from at least one hollow chamber between rotor disks into an axial passage, in a gas turbine which is provided with a bladed rotor and wherein the hollow chamber is present between the rotor disks and the axial passages are present on an outer peripheral part of the rotor. CONSTITUTION: A hollow chamber 9 is formed between disks 7, 8. A turbine is provided with a rotor blade 13 and a nozzle blade 14, and axial passages 17 (17ND, 17HD) are present between a platforms 16 composed of the rotor blade 13 and segmental heat barrier plates, and a rotor surface 15. Cooling air is supplied from a center passage 20 into the axial passage 17ND of the outer peripheral part of a rotor penetrating the hollow chamber 9 and a connecting opening 18. As cooling air is bled from a center part of a compressor, air is effectively cooled with a low temperature and low pressure. As the hollow chamber 9 is narrowed exceeding a ring chamber 11, contamination in cooling air is ejected from the connecting opening 18, and the contamination is prevented from sticking.